diff --git a/EmbeddedPkg/Include/Library/TimeBaseLib.h b/EmbeddedPkg/Include/Library/TimeBaseLib.h new file mode 100644 index 0000000000..fe3618e975 --- /dev/null +++ b/EmbeddedPkg/Include/Library/TimeBaseLib.h @@ -0,0 +1,68 @@ +/** @file +* +* Copyright (c) 2016, Hisilicon Limited. All rights reserved. +* Copyright (c) 2016, Linaro Limited. All rights reserved. +* +* This program and the accompanying materials +* are licensed and made available under the terms and conditions of the BSD License +* which accompanies this distribution. The full text of the license may be found at +* http://opensource.org/licenses/bsd-license.php +* +* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, +* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. +* +**/ + +#ifndef _TIME_BASE_LIB_H_ +#define _TIME_BASE_LIB_H_ + +#include + +// Define EPOCH (1970-JANUARY-01) in the Julian Date representation +#define EPOCH_JULIAN_DATE 2440588 + +// Seconds per unit +#define SEC_PER_MIN ((UINTN) 60) +#define SEC_PER_HOUR ((UINTN) 3600) +#define SEC_PER_DAY ((UINTN) 86400) +#define SEC_PER_MONTH ((UINTN) 2,592,000) +#define SEC_PER_YEAR ((UINTN) 31,536,000) + +BOOLEAN +EFIAPI +IsLeapYear ( + IN EFI_TIME *Time + ); + +BOOLEAN +EFIAPI +IsDayValid ( + IN EFI_TIME *Time + ); + +BOOLEAN +EFIAPI +IsTimeValid ( + IN EFI_TIME *Time + ); + +/** + Converts Epoch seconds (elapsed since 1970 JANUARY 01, 00:00:00 UTC) to EFI_TIME + **/ +VOID +EFIAPI +EpochToEfiTime ( + IN UINTN EpochSeconds, + OUT EFI_TIME *Time + ); + +/** + Converts EFI_TIME to Epoch seconds (elapsed since 1970 JANUARY 01, 00:00:00 UTC) + **/ +UINTN +EFIAPI +EfiTimeToEpoch ( + IN EFI_TIME *Time + ); + +#endif diff --git a/EmbeddedPkg/Library/TimeBaseLib/TimeBaseLib.c b/EmbeddedPkg/Library/TimeBaseLib/TimeBaseLib.c new file mode 100644 index 0000000000..0c0d940301 --- /dev/null +++ b/EmbeddedPkg/Library/TimeBaseLib/TimeBaseLib.c @@ -0,0 +1,171 @@ +/** @file +* +* Copyright (c) 2016, Hisilicon Limited. All rights reserved. +* Copyright (c) 2016, Linaro Limited. All rights reserved. +* +* This program and the accompanying materials +* are licensed and made available under the terms and conditions of the BSD License +* which accompanies this distribution. The full text of the license may be found at +* http://opensource.org/licenses/bsd-license.php +* +* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, +* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. +* +**/ + +#include +#include +#include +#include + +/** + Converts Epoch seconds (elapsed since 1970 JANUARY 01, 00:00:00 UTC) to EFI_TIME + **/ +VOID +EFIAPI +EpochToEfiTime ( + IN UINTN EpochSeconds, + OUT EFI_TIME *Time + ) +{ + UINTN a; + UINTN b; + UINTN c; + UINTN d; + UINTN g; + UINTN j; + UINTN m; + UINTN y; + UINTN da; + UINTN db; + UINTN dc; + UINTN dg; + UINTN hh; + UINTN mm; + UINTN ss; + UINTN J; + + J = (EpochSeconds / 86400) + 2440588; + j = J + 32044; + g = j / 146097; + dg = j % 146097; + c = (((dg / 36524) + 1) * 3) / 4; + dc = dg - (c * 36524); + b = dc / 1461; + db = dc % 1461; + a = (((db / 365) + 1) * 3) / 4; + da = db - (a * 365); + y = (g * 400) + (c * 100) + (b * 4) + a; + m = (((da * 5) + 308) / 153) - 2; + d = da - (((m + 4) * 153) / 5) + 122; + + Time->Year = y - 4800 + ((m + 2) / 12); + Time->Month = ((m + 2) % 12) + 1; + Time->Day = d + 1; + + ss = EpochSeconds % 60; + a = (EpochSeconds - ss) / 60; + mm = a % 60; + b = (a - mm) / 60; + hh = b % 24; + + Time->Hour = hh; + Time->Minute = mm; + Time->Second = ss; + Time->Nanosecond = 0; + +} + +/** + Converts EFI_TIME to Epoch seconds (elapsed since 1970 JANUARY 01, 00:00:00 UTC) + **/ +UINTN +EFIAPI +EfiTimeToEpoch ( + IN EFI_TIME *Time + ) +{ + UINTN a; + UINTN y; + UINTN m; + UINTN JulianDate; // Absolute Julian Date representation of the supplied Time + UINTN EpochDays; // Number of days elapsed since EPOCH_JULIAN_DAY + UINTN EpochSeconds; + + a = (14 - Time->Month) / 12 ; + y = Time->Year + 4800 - a; + m = Time->Month + (12*a) - 3; + + JulianDate = Time->Day + ((153*m + 2)/5) + (365*y) + (y/4) - (y/100) + (y/400) - 32045; + + ASSERT (JulianDate >= EPOCH_JULIAN_DATE); + EpochDays = JulianDate - EPOCH_JULIAN_DATE; + + EpochSeconds = (EpochDays * SEC_PER_DAY) + ((UINTN)Time->Hour * SEC_PER_HOUR) + (Time->Minute * SEC_PER_MIN) + Time->Second; + + return EpochSeconds; +} + +BOOLEAN +EFIAPI +IsLeapYear ( + IN EFI_TIME *Time + ) +{ + if (Time->Year % 4 == 0) { + if (Time->Year % 100 == 0) { + if (Time->Year % 400 == 0) { + return TRUE; + } else { + return FALSE; + } + } else { + return TRUE; + } + } else { + return FALSE; + } +} + +BOOLEAN +EFIAPI +IsDayValid ( + IN EFI_TIME *Time + ) +{ + STATIC CONST INTN DayOfMonth[12] = { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; + + if (Time->Day < 1 || + Time->Day > DayOfMonth[Time->Month - 1] || + (Time->Month == 2 && (!IsLeapYear (Time) && Time->Day > 28)) + ) { + return FALSE; + } + + return TRUE; +} + +BOOLEAN +EFIAPI +IsTimeValid( + IN EFI_TIME *Time + ) +{ + // Check the input parameters are within the range specified by UEFI + if ((Time->Year < 2000) || + (Time->Year > 2099) || + (Time->Month < 1 ) || + (Time->Month > 12 ) || + (!IsDayValid (Time) ) || + (Time->Hour > 23 ) || + (Time->Minute > 59 ) || + (Time->Second > 59 ) || + (Time->Nanosecond > 999999999) || + (!((Time->TimeZone == EFI_UNSPECIFIED_TIMEZONE) || ((Time->TimeZone >= -1440) && (Time->TimeZone <= 1440)))) || + (Time->Daylight & (~(EFI_TIME_ADJUST_DAYLIGHT | EFI_TIME_IN_DAYLIGHT))) + ) { + return FALSE; + } + + return TRUE; +} diff --git a/EmbeddedPkg/Library/TimeBaseLib/TimeBaseLib.inf b/EmbeddedPkg/Library/TimeBaseLib/TimeBaseLib.inf new file mode 100644 index 0000000000..1fbf13f7f9 --- /dev/null +++ b/EmbeddedPkg/Library/TimeBaseLib/TimeBaseLib.inf @@ -0,0 +1,34 @@ +#/** @file +# +# Copyright (c) 2016, Hisilicon Limited. All rights reserved. +# Copyright (c) 2016, Linaro Limited. All rights reserved. +# +# This program and the accompanying materials +# are licensed and made available under the terms and conditions of the BSD License +# which accompanies this distribution. The full text of the license may be found at +# http://opensource.org/licenses/bsd-license.php +# +# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, +# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. +# +#**/ + +[Defines] + INF_VERSION = 0x00010005 + BASE_NAME = TimeBaseLib + FILE_GUID = B1B07E01-6896-448C-8E75-F0E119ABDF49 + MODULE_TYPE = BASE + VERSION_STRING = 1.0 + LIBRARY_CLASS = TimeBaseLib + +[Sources.common] + TimeBaseLib.c + +[Packages] + EmbeddedPkg/EmbeddedPkg.dec + MdePkg/MdePkg.dec + +[LibraryClasses] + DebugLib + +[Pcd]